Curtimeticus rutundus, Irfan & Zhang & Peng, 2022

Irfan, Muhammad, Zhang, Zhi-Sheng & Peng, Xian-Jin, 2022, Survey of Linyphiidae (Arachnida: Araneae) spiders from Yunnan, China, Megataxa 8 (1), pp. 1-292 : 77-79

Curtimeticus rutundus sp. nov. (ṆƉẨƦ)

Figures 83 , 84

Types. Holotype ♀, CHINA, Yunnan, Gongshan County, Cikai Township, Dahaituo , 27.78440°N, 98.46038°E, alt. 3363m, 13 August 2006, Peng Hu leg. (Hu060813).

Etymology. This epithet derives from the Latin adjective “ rutundus ”, meaning “round” and refers to the round spermathecae in the epigyne.

Diagnosis. This new species resembles Curtimeticus nebulosus Zhou and Li, 2014 in having the similar wide ventral plate and the copulatory openings at the junction of dorsal and ventral plate ( Fig. 83B, C ; Zhou and Li, 2014, fig. 28C), but can be distinguished by the shorter and circular copulatory duct in C. rutundus sp. nov. ( Fig. 83B, C ), whereas straight in C. nebulosus (Zhou and Li, 2014, fig. 28C). Spermathecae globular in C. rutundus sp. nov. ( Fig. 83B, C ), whereas elliptical in C. nebulosus (Zhou and Li, 2014, fig. 28C).

Description. Female (holotype, Fig. 83A ): Total length: 2.57. Carapace 0.79 long, 0.63 wide; cephalic region slightly elevated, dark brown; fovea, cervical and radial grooves distinct. Clypeus 0.18 high. Sternum wider than long, dark brown, sparsely covered with microsetae. Labium wider than long. Maxillae long, distal end broad with scopulae. Chelicerae with five promarginal and five retromarginal teeth. Eye region narrow, AER recurved, PER straight, slightly wider than AER. Eye sizes and interdistances: AME 0.05, ALE 0.07, PME 0.05, PLE 0.06, AME–AME 0.03, PME–PME 0.05, AME–ALE, 0.02, PME–PLE 0.05, AME–PME 0.05, ALE–ALE 0.27, PLE–PLE 0.30, ALE–PLE contiguous. Length of legs: I 3.27 (0.91, 0.95, 0.85, 0.56), II 2.96 (0.81, 0.93, 0.74, 0.48), III 2.20 (0.72, 0.53, 0.54, 0.41), IV 3.09 (0.88, 0.95, 074, 0.52). Leg formula I-IV-II-III. Tm I 0.28 and Tm IV

0.21. Tibial spine formula: 2-2-1-1. Abdomen 1.78 long, 1.16 wide, oval, brown, covered with fine hairs.

Epigyne ( Fig. 83B, C ): Ventral plate sclerotized, wide, mid ventrally grooved; copulatory openings at the junction of dorsal and ventral plate; copulatory ducts short, located mesally, forming a loop before entering the spermathecae; spermathecae globular; fertilization ducts short, extending mesally.

Male. Unknown.

Distribution. Known only from the type locality ( Fig. 84 ).

Genus Erigone Audouin, 1826 (ẮƦø)

Figures

FIGURE 83. Curtimeticus rutundus sp. nov., female holotype. A Habitus, dorsal view B Epigyne, ventral view C Vulva, dorsal view.

FIGURE 84. Distribution of Curtimeticus rutundus sp. nov..